Final answer:
The correct ratio of compressions to breaths in one-person CPR is 30:2, which emphasizes the importance of chest compressions to maintain blood circulation in an emergency. The options given in the question do not accurately reflect this ratio.
Step-by-step explanation:
The ratio of compressions to breaths (inflations) in one-person CPR (Cardiopulmonary Resuscitation) according to recent guidelines is 30 compressions to 2 breaths. This technique is used in emergency situations when a person has stopped breathing or their heart has stopped beating effectively. By doing chest compressions, we manually pump blood through the heart to the rest of the body, including the brain. It is recommended to perform chest compressions at a depth of at least 5 cm and at a rate of approximately 100 per minute. Although the question presents options for a ratio of inflations to compressions, these are generally misconstrued, as the correct practice is to give 30 compressions followed by 2 breaths. Therefore, none of the provided options are correct.